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1996 Ford Probe

Tiny
BONEZ76
  • MEMBER
  • 1996 FORD PROBE
  • 6 CYL
  • FWD
  • MANUAL
  • 13,500 MILES
The engine stumbles when I "punch" the accelerator but when I gradually pick up speed it runs fine. The plugs/wires/cap & rotor are new. No trouble codes. Could it be timing. Leak in exhaust?
Saturday, September 12th, 2009 AT 1:42 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Oxygen sensor
Catalytic converter
Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires
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Saturday, September 12th, 2009 AT 2:29 AM

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